pragma solidity ^0.4.11; import "./SafeMath.sol"; contract NEFToken{ using SafeMath for uint; string public name = "NEFCoin"; string public symbol = "NEF"; string public standard = "NEF Token v1.0"; event Transfer(address indexed _from,address indexed _to,uint _value); event Approval(address indexed _owner,address indexed _spender,uint _value); uint public totalSupply; mapping(address => uint) public balanceOf; mapping(address => mapping(address=>uint)) public allowance; function NEFToken(uint _initialSupply) public { totalSupply = _initialSupply; balanceOf[msg.sender] = _initialSupply; } function transfer(address _to,uint _value) public payable returns(bool success){ require(_to != address(0)); require(_value <= balanceOf[msg.sender]); balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value); balanceOf[_to] = balanceOf[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } function approve(address _spender,uint _value) public returns(bool success){ allowance[msg.sender][_spender] = _value; emit Approval(msg.sender,_spender,_value); return true; } function transferFrom(address _from,address _to,uint _value) public returns(bool success){ require(_to != address(0)); require(_value <= balanceOf[_from]); require(_value <= allowance[_from][msg.sender]); balanceOf[_from] = balanceOf[_from].sub(_value); balanceOf[_to] = balanceOf[_to].add(_value); allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } function balance(address _owner) public view returns(uint){ return balanceOf[msg.sender]; } }
0.4.18